VideoLAN has released a major update of VLC, its open-source, multi-platform media playback software. Version 2.1 -- codenamed Rincewind -- is the first to support 4K "Ultra HD" video, and has been given quicker video decoding and a rewritten audio system, the latter with improvements like higher fidelity, new effects, and better volume and device management. OpenGL output has been ported to OpenGL ES, which should make it easier to port to iOS and Android, and MKV playback has received faster seek performance and enhanced subtitle metadata support.